Abstract

A total of 16 males (mean age = 10.9 years) were tested on six trials of a signaled, running time task while heart rate was recorded. The preparatory interval varied randomly among 10, 15, or 20 sec. The response consisted of running a distance of 4.62 m. A triphasic heart rate response (deceleration-acceleration-deceleration) occurred following the warning signal. A stable deceleration below pre-stimulus levels was observed during the 5-sec period prior to the respond signal. Heart rate responses were not related to running time.

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